A mute control circuit used upon power-on or power-off comprises a charge/discharge module, a first switch module and a second switch module. Upon power-on or power-off, charging or discharging is performed between the charge/discharge module and a power supply end. Upon charging or discharging, the charge/discharge module outputs a first level to the first switch module to control turning on of the same, and the first switch module outputs a second level to the second switch module to control turning on of the second switch module, such that the second switch module outputs a high level to a mute circuit to activate operation of the mute circuit. Also provided are a control method and an audio device.

A hearing aid system includes an image capturing device capturing an image, microphones, an audio processing device connected with the image capturing device and the microphones, and an audio output device connected with the audio processing device. The audio processing device, by using classification models, performs analysis on the image to determine one of the classification models, controls the microphones to receive sound according to a plan which corresponds to the classification model, and operates in a mode corresponding to the plan to perform audio signal processing on collected audio signal(s) generated by the microphones so as to generate a processed audio signal, based on which the audio output device outputs sound.

The application discloses a multichannel echo cancellation circuit and method and smart device. The multichannel echo cancellation circuit comprises signal extraction circuits, one ends of which are connected to the audio channels of the corresponding loudspeakers, to extract part of the audio signals from the audio channels of the corresponding loudspeakers as echo cancellation reference signals; the other ends of the signal extraction circuits are connected to the isolating circuits; the isolating circuits are interconnected to form one noise channel by which the echo cancellation reference signals extracted by each of the signal extraction circuits are formed into one channel of noise signal and then outputted to the processor; and the processor subtracts the noise signal from the sound signal collected by the microphone according to the noise signal inputted and a sound signal collected by a microphone, to obtain a signal that has been denoised.

Systems and methods are provided that may be implemented to modify information of an audio data transmission based on one or more measured signal reception and/or transmission characteristics of a radio frequency (RF) signal data transmission that contains or otherwise conveys the audio data transmission. The modified audio data may then be acoustically reproduced in analog form as sound waves. Examples of signal reception characteristics of a RF signal data transmission that may be measured and used as a basis for modifying information of audio data of an audio data transmission include, but are not limited to, time Difference of Arrival (TDOA), Angle of Arrival (AoA), measured received signal strength, etc. Example signal transmission characteristics of a RF signal that may be measured and used as a basis for modifying information of audio data include, but are not limited to, Angle of Departure (AoD).

A sound source playback unit plays back sound data from a sound source and outputs a playback signal. An amplification unit amplifies the playback signal and outputs the playback signal as an output signal converted to sound in a speaker. A fault detection unit including a first conversion circuit compares the playback signal to a predetermined first threshold, converts a waveform of the playback signal, and outputs the converted waveform as a converted playback signal. A second conversion circuit compares the output signal to a predetermined second threshold, converts a waveform of the output signal, and outputs the converted waveform as a converted output signal. A comparison circuit compares the converted playback signal to the converted output signal, and a determination circuit determines an output of the comparison circuit. Based on the determination, the fault detection unit detects a fault in the amplification unit.

A localized sound projection system can coordinate the sounds of speakers to simulate the placement of an auditory cue in a 3D space. The system can include a plurality of speakers configured to output auditory signals and a sound localization controller configured to control the plurality of speakers to coordinate the auditory signals to simulate an origination location of a patient alarm. The sound localization controller can determine adjusted auditory signals and control a plurality of speakers to output the plurality of adjusted auditory signals. A method for dynamically controlling speaker settings in a medical environment can include determining volume settings corresponding to a speaker, monitoring a level of ambient noise corresponding to a room of a patient, controlling the volume settings of the speaker to reduce or increase a sound level output of a speaker. A patient monitoring system can be configured to physically manipulate medical devices in response to audible commands. The system can receive a plurality of vocal commands from a user and can manipulate various settings after confirmation from a user.

Methods and apparatuses for addressing open space noise are disclosed. In one example, a method for masking open space noise includes optimizing a recorded naturally occurring sound signal. The method also includes outputting the optimized recorded naturally occurring sound signal from a plurality of speakers distributed in the open space. Further, the method includes displaying a natural system complementing the optimized recorded naturally occurring sound signal.

A loudspeaker includes a yoke, an annular magnet, a voice coil, and an open type inductive coil. The annular magnet is combined to the yoke, and a magnetic gap is provided between the annular magnet and the yoke. The voice coil is disposed in the magnetic gap. The open type inductive coil is combined to the yoke or the annular magnet, and the open type inductive coil corresponds to the voice coil. An inductive gap is located between the open type inductive coil an the voice coil, where the open type inductive coil includes a coil unit and two signal transmission lines. The coil unit includes opposite open ends, first ends of the signal transmission lines are respectively connected to the open ends, and second ends of the signal transmission lines are exposed out of the yoke and the annular magnet, so as to transmit mutual inductance signals between the coil unit and the voice coil to outside.

Noise filtering for an incoming signal is provided. The noise filtering method includes executing a transformation operation on the incoming signal by distributing energy corresponding to each of a plurality of components of the incoming signal into a two-dimensional representation. The noise filtering method also includes executing a filtering operation on the plurality of components to determine real objects and remove noise within the incoming signal. The filtering operation utilizing at least one of a plurality of noise detection matrixes based on time, frequency, or direction.

Disclosed is a suspended audio device with bass enhancement performance, including a low-pass filter, a high-pass filter, an energy controller and a harmonic generator. The low-pass filter is configured to extract a low-frequency signal in an original input signal, and input the low-frequency signal as a fundamental wave of the harmonic generator; the high-pass filter is configured to extract a mid-high frequency signal in the original input signal; the harmonic generator is configured to process the low-frequency signal extracted by the low-pass filter through the NLD algorithm, and generate at least one enhanced harmonic signal in the low-frequency signal; the energy controller is configured to control an overall gain of the at least one enhanced harmonic signal generated by the harmonic generator.